. >> last year scientists at this california-based biotechnology company introduced a revoluti revolutionary blood test. it's said to be accurate as the whether a child will be born with down syndrome. researchers at the company have been busy, they're analyzing blood from the note feather langds, israel and other countries. at this time the test requires sticking a needle into the ute truss. the new test carries no such risk. more than 20,000 women in the united states have already taken the test. andrea has miscarried in the past. when she was pregnant again, she chose the new test. her relates were negative and she had a healthy boy this may. >> i think by getting a yes or a no, it will help the parents prepare for what they're about to encounter. the test, good or bad raises questions. genetic counselors who specialize in prenatal testing operate on genetic abnrm mallities. >> counseling staff will increase in the u.s., and they now number over 1,800. >> the test may soon be available in japan, here too people are debating the ethics. >> reporter: researchers at this tokyo hospital are p